2 SSA GCON 10's or AB XFL 10's

I think I've narrowed it down to either the GCONs for the XFLs. Looking for some opinions on both subs. I want a nice SQ setup. Thinking of powering the XFLs with the PH-4000 MD and the Gcons with Lanzar - Optidrive Digital Mono Block 2000 Watt Half Ohm Stable. Opinions on these setups plz